Both has the same memory clock as GTX 680, GTX 660 Ti is the same GTX 680 chips with defects and Nvidia decided to disabled 2 SMXs to reduced CUDA cores, texture units, ROPs and memory interface but still has the same base and boost clocks speed to sell it at very attractive price $249.

I can see the 670 being a good buy at that price, it will more than likely outperform the 7950 which is priced the same. The 660Ti is priced nicely but I'm just not sure exactly how it will perform. I'd say it should be on par with the 7870 for most things that don't use more than 1.5GB of VRAM. This will force prices of the 7870 down - That would be great, but AMD have more room to move on prices for the 78xx series given the smaller die size. Memory prices will be similar, NV use more expensive faster memory but less of it, while AMD use more slower/cheaper memory.

Quantity for NV is the main thing I think. At these prices the demand is going to go through the roof... they must have a lot of semi-defective chips!

The memory bandwidth is slightly lower on the 660, but it has the same amount vram, 1536.

Fill rate is higher, as mentioned and power is much better. I was thinking maybe get one of these real cheap without losing performance (I can't afford a 680 or 690 any more) and maybe down the road pick up another for SLI. Maybe.

Those are different types of core, as the GTX480 has double clocked cores, while the 660ti will have single clock ones (all nv cores till Kepler were dual clocked. Kepler changed to single clock, but twice the numbers).

Don't expect 1.7x performance, you will be disappointed. In most cases the 660Ti should be faster, but by how much I'm not sure. In same cases it could very well be slower due to the lower memory bandwidth, but those shouldn't be too common. Maybe a 670 will suit you better? Guess you'll find out shortly.

$249? I wasn't expecting such a high price. I was expecting something to counter AMD's 7750 in the $120 range. At this rate, we'll see a single slot low profile 7750 before we see a nVidia Kepler equivalent.

Looks like nVidia is still depleting it's stockpiles of GT 430, GT 520, GT 250, etc. before they even consider a low end HTPC type card in 2013.

Seems like a bad time to buy with the new consoles supposedly dropping at the end of the year. Still, this 8800gt is getting old fast, its finally showing its age after all these years. I might bite..just can't quit pull the trigger.